﻿using Microsoft.AspNetCore.Builder.Extensions;
using Microsoft.AspNetCore.Mvc;
using Microsoft.AspNetCore.Mvc.ApplicationModels;
using Microsoft.AspNetCore.Mvc.Routing;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace Bridge.Shared.Extensions
{
    /// <summary>
    /// WebAPI批量添加版本号扩展类
    /// </summary>
    public static class MvcOptionsExtensions
    {
        /// <summary>
        /// 扩展方法
        /// </summary>
        /// <param name="opts"></param>
        /// <param name="routeAttribute"></param>
        public static void UseCentralRoutePrefix(this MvcOptions opts, IRouteTemplateProvider routeAttribute)
        {
            // 添加我们自定义 实现IApplicationModelConvention的RouteConvention
            opts.Conventions.Insert(0, new RouteConvention(routeAttribute));
        }
    }

    /// <summary>
    /// 全局路由前缀配置
    /// </summary>
    public class RouteConvention : IApplicationModelConvention

    {

        /// <summary>
        /// 定义一个路由前缀变量
        /// </summary>
        private readonly AttributeRouteModel _centralPrefix;
        /// <summary>
        /// 调用时传入指定的路由前缀
        /// </summary>
        /// <param name="routeTemplateProvider"></param>
        public RouteConvention(IRouteTemplateProvider routeTemplateProvider)
        {
            _centralPrefix = new AttributeRouteModel(routeTemplateProvider);
        }


        //接口的Apply方法
        public void Apply(ApplicationModel application)
        {
            var list = new List<string> { "AbpServiceProxyScriptController", "ApplicationService", "AbpApplicationConfigurationScriptController" };
            foreach (var controller in application.Controllers.Where(x => x.ControllerType.Name != "AbpApiDefinitionController"))
            {
                if (list.Exists(x => x == controller.ControllerType.BaseType.Name))
                {
                    continue;
                }
                // 1、已经标记了 RouteAttribute 的 Controller
                //这一块需要注意，如果在控制器中已经标注有路由了，则会在路由的前面再添加指定的路由内容。
                var matchedSelectors = controller.Selectors.Where(x => x.AttributeRouteModel != null).ToList();
                if (matchedSelectors.Any())
                {

                    foreach (var selectorModel in matchedSelectors)

                    {

                        // 在 当前路由上 再 添加一个 路由前缀
                        selectorModel.AttributeRouteModel =

                            AttributeRouteModel.CombineAttributeRouteModel(_centralPrefix,
                            selectorModel.AttributeRouteModel);

                    }

                }
                //2、 没有标记 RouteAttribute 的 Controller
                var unmatchedSelectors = controller.Selectors.Where(x => x.AttributeRouteModel == null).ToList();
                if (unmatchedSelectors.Any())
                {

                    foreach (var selectorModel in unmatchedSelectors)
                    {
                        // 添加一个 路由前缀
                        selectorModel.AttributeRouteModel = _centralPrefix;

                    }

                }

            }

        }

    }
}
